Support setting a target node for Shortcut
Even if there's no user interface which could handle Shortcut nodes (page tree redirects to the actual node, for example), it would be useful to enhance the Shortcut page type so that a specific node can be set programmatically instead of the behavior to redirect to the first sub node.
[FEATURE] Support manually set target node for Shortcut
This enhances the Shortcut content type to support a specifically set
target node which overrides the default behavior or redirecting to the
first sub node. The property "targetNode" currently needs to be set
manually (through the Node API) as there is no user interface in place